RRT
      ----------
WYUQW ) YWQMUUTM
       -YFQWWF
        ======
         YUUYQT
        -YFQWWF
         ======
          QTRTUM
         -QYWMMY
          ======
           RQWRF

base: 9
symbols: FMPQRTUWY
missing: P
difficulty: intermediate
restrictions: no multiplication